Universal extra dimension: Violation of Kaluza-Klein parity

Details Universal extra dimension: Violation of Kaluza-Klein parity Universal extra dimension: Violation of Kaluza-Klein parity

2008-10-24

arxiv.org/abs/0810.4441v2

Phys.Rev.D79:016006,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 5 figures,a few comments added

Scientific paper

10.1103/PhysRevD.79.016006

The minimal Universal Extra Dimension (mUED) model respects the Kaluza-Klein (KK) parity $(-1)^n$, where $n$ is the KK number. However, it is possible to have interactions located at only one of the two fixed points of the $S_1/\ztwo$ orbifold. Such asymmetric interactions violate the KK parity. This kills the cold dark matter component of UED but also removes the upper bound on the inverse compactification radius, and thus non-observation of the KK excitations even at the Large Hadron Collider does not necessarily invalidate the model. Apart from the decay of the lightest $n=1$ KK excitation, this leads to collider signals which are markedly different from those in the mUED scenario. The phenomenological consequences of such KK-parity violating terms are explored.

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